Identification of burning and extinguishing behaviour in spray flames with spark ignition

Baayens, Jocelyn and Wandel, Andrew P. (2015) Identification of burning and extinguishing behaviour in spray flames with spark ignition. In: Australian Combustion Symposium 2015, 7-9 Dec 2015, University of Melbourne, Victoria.

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Abstract

The Gaussian Mixture Model (GMM) is used to analyse Direct Numerical Simulation results for sprays which are ignited using spark ignition. The variables considered in the GMM are the reaction progress variable and its dissipation. It is found that a case which sustained a self-propagating flame produces a burning branch, where a strong flame front is developed, and an extinguishing branch, which contains droplets which are offset from the main spark energy. These branches are distinctly observed through the various clusters that are formed by the GMM. In contrast, cases which ignite but subsequently undergo global extinction do not produce clusters that are distinctly from the burning branch or extinguishing branch near the flame kernel. However, the clustering does display a strong extinguishing branch near the leading edge of the flame front.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: The copyright of the individual papers contained in this volume is retained and owned by the authors of the papers.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 10 Jun 2016 04:52
Last Modified: 27 Feb 2017 23:24
Uncontrolled Keywords: Direct Numerical Simulations; spark ignition; spray flames; extinction; Gaussian Mixture Model
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
01 Mathematical Sciences > 0103 Numerical and Computational Mathematics > 010301 Numerical Analysis
09 Engineering > 0902 Automotive Engineering > 090201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
Socio-Economic Objective: B Economic Development > 85 Energy > 8507 Energy Conservation and Efficiency > 850702 Energy Conservation and Efficiency in Transport
URI: http://eprints.usq.edu.au/id/eprint/28696

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